package com.atguigu.gulimall.cart.controller;

import com.alibaba.fastjson.JSON;
import com.atguigu.common.constant.AuthServerConstant;
import com.atguigu.gulimall.cart.interceptor.CartInterceptor;
import com.atguigu.gulimall.cart.service.CartService;
import com.atguigu.gulimall.cart.vo.Cart;
import com.atguigu.gulimall.cart.vo.CartItem;
import com.atguigu.gulimall.cart.vo.UserInfoTo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import java.util.List;
import java.util.concurrent.ExecutionException;

@Controller
public class CartController {


    @Autowired
    CartService cartService;
    @GetMapping("/currentUserItems")
    @ResponseBody
    public List<CartItem>  getCurrentUserItems(){
       return cartService.getUserCartItems();
    }

    /**
     * 浏览器有一个cookie：user-key：标识用户身份，一个月后过期
     * 如果第一次使用jd的购物车功能，都会给他一个临时的用户身份
     * 浏览器以后保存，每次访问都会带上这个cookie
     *
     * 如果登录 session有用户
     * 如果没登录，cookie里user-key来做
     *
     * 第一次没有临时用户还需要帮忙创建一个临时用户
     *
     * ThreadLocal-同一个线程共享数据
     */
    @GetMapping("/cart.html")
    public String cartListPage(Model model) throws ExecutionException, InterruptedException {
        //快速获得用户信息
        Cart cart = cartService.getCart();
        model.addAttribute("cart",cart);
        return "cartlist";
    }


    /**
     * 添加商品到购物车
     * RedirectAttributes ra
     * ra.addFlashAttribute():将数据放在session李米娜可以在页面取出，但是只能取一次
     * ra.addAttribute();将数据放在url后面
     * skuId：商品id
     * num：数量
     */
    @GetMapping("/addToCart")
    public String addToCart(@RequestParam("skuId") Long skuId , @RequestParam("num") Integer num , RedirectAttributes ra) throws ExecutionException, InterruptedException {
        cartService.addToCart(skuId,num);
        //model.addAttribute("skuId",skuId);
        ra.addAttribute("skuId",skuId);
        return "redirect:http://cart.gulimall.com/addToCartSuccess.html";
    }


    /**
     * 跳转到成功页
     * @param skuId
     * @param model
     * @return
     */
    @GetMapping("/addToCartSuccess.html")
    public String addToCartSuccessPage(@RequestParam("skuId") Long skuId , Model model){
        //重定向到成功页面，再次查询购物车数据即可
        CartItem item = cartService.getCartItem(skuId);
        model.addAttribute("item",item);
        return "success";
    }

    @GetMapping("/deleteItem")
    public String deleteItem(@RequestParam("skuId") Long skuId) {
        cartService.deleteItem(skuId);
        return "redirect:http://cart.gulimall.com/cart.html";
    }


    /**
     * 修改购物项数量
     * @param skuId
     * @param num
     * @return
     */
    @GetMapping("/countItem")
    public String countItem(@RequestParam("skuId") Long skuId, @RequestParam("num") Integer num) {
        cartService.changeItemCount(skuId,num);
        return "redirect:http://cart.gulimall.com/cart.html";
    }

    /**
     * 勾选购物项
     * @param skuId
     * @param check
     * @return
     */
    @GetMapping("/checkItem")
    public String checkItem(@RequestParam("skuId") Long skuId, @RequestParam("check") Integer check) {
        cartService.checkItem(skuId,check);
        return "redirect:http://cart.gulimall.com/cart.html";
    }

}
